Furnace-ash-pit screen sifter



J. JIRASEK FURNACE ASH PIT SCREEN SIFTER July 3, 1923. 1,460,547

Filed Feb. l. 1925 2 Sheets-Sheet l July 3, 1923.

l J. JIRASEK FURNACE ASH PIT SCREEN SIIFTER Filed Feb. l. 1925 2 Sheets-Sheet 2 Patented July 3, 1923.

rURnacii-AsH-rrr- SCREEN srrm'nn.

Application aie'a remuary 1, 1923. serial No. 616,362."

y zen of the-United States of America, residing in the city of'Detroit, county of Vayne, State of Michigan, have'invented certain new and useful Improvements in Furnace-Ash-Pit Screen Sifter, 'and declare the following to be a full, clear, and exact description of the same, such ais will enable others skilled in the art tov which it per tains to make and use the saine, reference being had to' the' accompanying drawings, which form a part of these specifications.

The object of my invention is to provide a sifting device that can be installed in the ash pit of a furnace for the purposel of screening the small 'pieces of coalfromthe ashes as may pass vthrough the lire vgrates of the furnace, thus preventing the loss of much fuel. l i

Another-object isto provide anl ash sifter for screening the coal therefrom, keeping the same within the furnace inclosure, preventing the dust that ordinarily arises from the sifting the ashes by the separate ash sifter.

A further object is to provide an ash sifter that is simple in construction, easily and efficiently operated and can be manu# factured at a low cost. v

'Theseseveral objectsare secured in their preferred form by the construction and arrangements of parts more fully hereafter described.

Similar parts on all drawings are marked by similar numerals.

Fig. 1, is the front view lof the furnace, showing the ash pit screen sifter installed therein.

Fig. 2, is a side view of the furnace showing the general arrangement of the working parts and the relative position of the sifterto the fire grates.

Fig.i3, is a sectional view *AA- of F l, showing the ash pit screen sifter and the supporting frame as arranged in the furnace.

Fig. 4: is a detail' of the sifter support, showing the means for attaching same to the furnace parts.

Fig. 5, is an end view of the sifter support with the connecting parts. f

Fig. 6, is a detail of the sifter basket.

Figs. 7 and 8 show the side vand end view of same.

I will now describe'more fullythe detailed constructionv of `my ash pitv screen sifter, referring tothe drawings and the marks thereon.

The general construction of the ash pitv sifter comprises a horizontal U-shaped slide support, attached in the upper portion of the ash pit in the furnace, and'a'wire screen coal basket sliding thereon and so located that it rests directly beneaththe fireL grates, receiving'allparticles of ashes and coalthat through the screensieve and the lumpsfof coal being Aretained in the basket and'can be l easily removed 'and again placed into the re to be burned. Y f

l The main sifter'support -1--14- is a'U'- shaped slide made of a at bar ofsteel,lbent to conform closely with the walls' of the furnace ash pit-'2-. Near the 'ends ofthesupport frame -l-, are attached the` angle clips -3-, having one of the arms riveted thereto, with the extending arm ofthe clip bent at right angles to the face of the support, and receiving the support clamps Clamps 4 beingof the required construction to attach to the casting ire'fbox by means-of bolts -5`. At the back' of the U-shaped sifterl support -l, is lattached a support leg being made of an angle iron, with the top ends bent over to 'at-y tach to the support frame by means of rivets. cient to reach to the bottom of the lash pit, supporting the frame in a horizontal position.- Around the rim of the support frame -l-, are attached small clips .-7-, to act as stops for the screen sifter basket. The sifter basket -A- is made o-f an angle iron frame, supporting the wire basket attached thereto, and of such size and lshape as will slide within and rest upon the slide support -l-. The outer frame -9- is made of an angle iron bent into a U-shaped frame, with the top leg bentup at an angle, to make the basket support .wedge snugly be-y tween the slide bars of support -l. The angle frame -10- forming the front of The length of the leg 6 is suf.k l

the basket support, is left square, same be- Y ing for support only. Around the bottom of the frame -9-, is a heavy wire rimk 1jr-,which supports the wire'screen sieve l l -12, forming the basket sifter. The wire ilo front of the sifter basket is provided With a handle -14-, for shaking and removing the basket from the ash pit.

In using my ash pit screen sifter, after the slide support is installed in the ash pit of the furnace, the basket can be placed on the slide, and pushed Within the pit directly beneath the grates, through the door 'l5- in the front of the furnace. The basket being supported by the angle iianges of the side frame -9-. Should the basket become filled, the ashes may easily be screened out by shaking same back and forth on the slide support, leaving the coal separated to be removed and placed in the furnace again.

Having fully described my furnace ash pit screen sifter, What I claim as my invention and desire to secure by Letters Patent is l. An ash pit screen sifter of the charac-- ter described, comprisinga Wire screen basket, angle slides for the sides of said basket, means for attaching said slides to the basket, a support slide frame for holding the basket in place beneath the fire grates of the furnace supports for attaching said frame permanently to the Walls of the ash pit and means for operating said sifter for separating the coal from theburned ashes.

2. An ash pit screen sifter of the character described comprising a Wire' screen basket, a supporting slide frame attached to the top of said screen basket, means for attaching same to the basket, said slides having the sides bent outward to engage projecting supports, a supporting slide rack conforming to they shape of the basket supporting` frame and engaging the slides thereon, means for attaching the support slide rack to the ash pit' Walls and means for sliding the sifter basket in and out of the pit on said sliding support-rack.

3. An ash sifter of the character described comprising a screen basket conforming approximately to the Walls of a furnace ash pit, a metal frame tting into the top of said screen basket, said frame having overhanging Walls along the sides thereof forming sliding supports for the basket, fasteners for attaching the basket to the metal frame, a draw bar handle at one end of said basket for operating the sifter basket, a supporting slide rack conforming to the shape of the basket frame and engaging the slides thereon allowing the sifter basket to be moved in and out of the ashpit, brackets attached to the supporting slide rack for permanently installing` same in the ash `pit by attaching same to the Walls thereof.

In Witness WhereofI sign these specications. f

JOHN JIRASEK. 

